Protecting your electric guitar or bass is very important (unless you want the hum to be part of your sound, which many musicians do ) if you don't want your guitar to pick up unwanted noise (this could be from fans, neon lights, etc.). Shown is my American Fender Stratocaster guitar with upgraded DiMarzio pickup and full EMI shielding with this sheet. I did a continuity test and the glue is also conductive so you will end up with a pretty tight faraday cage in your lml guitar. You will not be disappointed with this product.